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Anti-abrasion anti-etching alloy rod production method through powder metallurgy process

A powder metallurgy and corrosion-resistant alloy technology, which is applied in the field of powder metallurgy process for preparing wear-resistant and corrosion-resistant alloy bars, can solve the problems of increasing the overall cost of the alloy, adverse effects of alloy performance, segregation of alloy elements, etc., so as to reduce the increase in the oxygen content of the alloy. , reduce production costs, accelerate the effect of floating removal

Inactive Publication Date: 2015-09-09
ADVANCED TECHNOLOGY & MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, alloys for tools and molds are mainly prepared by traditional casting and forging processes. The liquid alloy is slowly cooled and solidified during the pouring process. The alloy components are prone to segregation during the solidification process and form coarse structures. Even after subsequent forging and rolling, this bad structure will still be formed. Alloy properties have adverse effects, resulting in low levels of alloy properties including strength, toughness, wear resistance, and grindability
The powder metallurgy process is used to prepare alloys to solve the problem of alloy element segregation. The prepared alloy structure is fine and uniform. Compared with cast and forged alloys, the performance is greatly improved, but the powder preparation cost is high, which increases the overall cost of the alloy. How to reduce powder metallurgy? The cost of alloy preparation process is a problem that needs to be solved

Method used

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  • Anti-abrasion anti-etching alloy rod production method through powder metallurgy process

Examples

Experimental program
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Embodiment 1

[0033] This embodiment relates to a method for preparing wear-resistant and corrosion-resistant alloy rods by powder metallurgy, including the following preparation steps:

[0034] Step 1. Prepare an iron-based alloy powder with wear-resistant and corrosion-resistant properties. The mass percentage of the chemical composition of the alloy is C: 2.68%; W: 0.5%; Mo: 1.3%; Cr: 16.5%; V: 8.3% ; Nb: 2.0%; Co: 0.2%; Si: 0.6%; Mn: 0.3%; N: 0.12%; O: 0.006%; The powder metallurgy process steps are as follows:

[0035] a. Transfer the molten steel to the ladle, and the loading weight of the molten steel is 3 tons;

[0036] b. The upper surface of the molten steel in the ladle is covered with ladle mold slag, and the ladle mold slag is heated to maintain the superheat of the molten steel at 110°C; nitrogen gas is introduced at the bottom of the ladle to stir the molten steel;

[0037] c. Flow the molten steel into the tundish preheated to 850°C through the molten steel diversi...

Embodiment 2

[0044] This embodiment relates to a method for preparing wear-resistant and corrosion-resistant alloy rods by powder metallurgy, including the following preparation steps:

[0045] Step 1. Prepare an iron-based alloy powder with wear-resistant and corrosion-resistant properties. The mass percentage of the alloy chemical composition is C: 2.08%; W: 0.5%; Mo: 1.5%; Cr: 16.5%; V: 4.6% ; Nb: 1.8%; Co: 0.3%; Si: 0.6%; Mn: 0.5%; N: 0.08%; O: 0.006%; The powder metallurgy process steps are as follows:

[0046] a. The molten steel is transferred to the ladle, and the loading weight of the molten steel is 5 tons;

[0047] b. The upper surface of the molten steel in the ladle is covered with ladle mold slag, and the ladle mold slag is heated to maintain the superheat of the molten steel at 150°C; argon gas is introduced at the bottom of the ladle to stir the molten steel;

[0048] c. Flow the molten steel into the tundish preheated to 1000°C through the molten steel diversion pipe at ...

Embodiment 3

[0055] This embodiment relates to a method for preparing wear-resistant and corrosion-resistant alloy rods by powder metallurgy, including the following preparation steps:

[0056] Step 1. Prepare an iron-based alloy powder with wear-resistant and corrosion-resistant properties. The mass percentage of the chemical composition of the alloy is C: 2.1%; W: 0.5%; Mo: 1.5%; Cr: 22.0%; V: 4.0% ; Nb: 1.0%; Co: 0.2%; Si: 0.8%; Mn: 0.4%; N: 0.05%; O: 0.008%; The powder metallurgy process steps are as follows:

[0057] a. Transfer the molten steel to the ladle, and the loading weight of the molten steel is 7 tons;

[0058] b. The upper surface of the molten steel in the ladle is covered with ladle mold slag, and the ladle mold slag is heated to maintain the superheat of the molten steel at 140°C; nitrogen gas is introduced at the bottom of the ladle to stir the molten steel;

[0059] c. Flow the molten steel into the tundish preheated to 1200°C through the molten steel diversion pipe ...

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Abstract

The invention relates to an anti-abrasion anti-etching alloy rod production method through a powder metallurgy process. Iron base alloy powder with anti-abrasion anti-etching performance characteristics and inner carbon steel or stainless steel alloy are subjected to hot isostatic pressing encapsulation combination to be formed into anti-abrasion anti-etching alloy rods through hot isostatic pressing combination. The produced alloy rod tissue structure is compact completely, and two layers of alloy are integrated tightly, accordingly, the requirement of application work conditions for anti-abrasion anti-etching performances is met, the use amount of high-cost alloy powder is reduced, the production cost is reduced, and the product market competitiveness is improved. The method is simple to operate, easy to control and provided with wide application markets.

Description

technical field [0001] The invention relates to a method for preparing alloy rods, in particular to a method for preparing wear-resistant and corrosion-resistant alloy rods by powder metallurgy. Background technique [0002] Under some special working conditions, the surface of tools, molds or mechanical parts is not only subjected to direct contact with hard abrasive particles in moving parts or working media to cause wear, but also to be corroded by moisture, acid or other corrosive agents, such as in injection molding machinery. Parts such as screw or screw sleeve, on the one hand, due to the addition of a large number of hard particles in the plastic, such as glass fiber, carbon fiber, etc., the wear of these parts is increased, and on the other hand, the corrosive components in the plastic will chemically corrode the parts. In order to make the parts used in these special working conditions have a long service life, the surface of the alloy used must have high wear resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/15B22F5/12B22F7/06
Inventor 李小明吴立志况春江王学兵匡星
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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